Which of the following lists the common seed-treatment application equipment types?

• A. Drum coaters, sprayers, and harvesters
• B. Inline coaters, seeders, and planters
• C. Rotating belt seed treaters, dust collectors, conveyors
• D. Drum coaters, inline coaters, rotating belt seed treaters

Answer: (D)

The main idea here is identifying the equipment that actually applies coatings to seeds in seed-treatment processes. Drum coaters work by tumbling seeds in a rotating drum while a coating is metered in, producing even coverage as the seeds rotate. Inline coaters place coating in the seed-flow path within a processing line, allowing precise, continuous application as seeds move through. Rotating belt seed treaters spread seeds on a moving belt or bed, with coating applied as they travel, which also yields uniform coverage and controlled application.

Other items mentioned aren’t used for applying seed treatments in the typical processing setup: sprayers are used for applying liquids to crops in the field or greenhouse, not for coating seeds in-line; harvesters and planters are for harvesting or planting, not coating seeds; dust collectors are part of air handling and filtration, not coating seeds.

So, the common seed-treatment application equipment types are drum coaters, inline coaters, and rotating belt seed treaters.